ENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEI1EIENGINE IMMOBILISER SYSTEMHOW TO PROCEED WITH TROUBLESHOOTINGHINT:Use this procedure to troubleshoot the engine immobiliser system.The intelligent tester should be used in steps 4, 5 and 7.NEXTNEXTNEXT(a) Check for DTCs and note any codes that are output.(b) Delete the DTC.(c) Recheck for DTCs. Based on the DTC output in (a), try to force output of the same SFI system DTC or engine immobiliser system DTC by simulating the original activity indicated by the DTC.(1) If the DTC does not reoccur, proceed to A.(2) If the SFI system DTC reoccurs, proceed to B.(3) If the engine immobiliser system DTC reoccurs, proceed to C.BCA(a) Connect the intelligent tester to the DLC3.(b) Turn the ignition switch ON and push the intelligent tester main switch ON.1 VEHICLE BROUGHT TO WORKSHOP2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK3 CRANK ENGINE FOR MORE THAN 10 SECONDS4 CHECK FOR DTCSGo to SFI SYSTEM Go to step 85 READ VALUE OF INTELLIGENT TESTER EI2ENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEI(c) On the intelligent tester, enter the following menus: DIAGNOSIS/OBD MOBD/DATA LIST/IMMOBILISER/KEY SW. Read the values.Transponder key ECU assemblyOK:ON (key is in ignition key cylinder) appears on the screen.NGOK(a) If the fault is not listed in the problem symptoms table, proceed to A.(b) If the fault is listed in the problem symptoms table, proceed to B.BA(a) DATA LIST/ACTIVE TEST (See page EI-21) (1) Inspection with the intelligent tester (DATA LIST)(2) Inspection with the intelligent tester (ACTIVE TEST)(b) Terminals of ECU (See page EI-15) NEXTNEXTNEXTItemMeasurement Item/Display (Range)Normal Condition Diagnostic NoteKEY SWUnlock warning switch signal/ON or OFFOFF: No key is in ignition key cylinderON: Key is in ignition key cylinder-Go to DTC B27806 PROBLEM SYMPTOMS TABLEGo to step 87 OVERALL ANALYSIS AND TROUBLESHOOTING8 ADJUST, REPAIR OR REPLACE9 CONFIRMATION TESTENDENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEI3EIPARTS LOCATIONENGINE ROOM R/B AND J/BECMSECURITY INDICATOR LIGHT ASSEMBLYMAIN BODY ECU (INSTRUMENT PANEL J/B)TRANSPODER KEY ECU ASSEMBLYTRANSPONDER KEY AMPLIFIERDLC3- ECU-B FUSE- AM2 FUSEHATCHBACK:- IGN FUSE- INTEGRATION RELAY (IG2 RELAY)UNLOCK WARNING SWITCH ASSEMBLYB116296E03EI4ENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEISEDAN:ECMMAIN BODY ECU (INSTRUMENT PANEL J/B)- INTEGRATION RELAY (IG2 RELAY)- AM2 FUSE- ECU-B FUSEENGINE R/B AND J/BSECURITY INDICATOR LIGHT ASSEMBLYTRANSPONDER KEY AMPLIFIERTRANSPONDER KEY ECU ASSEMBLYDLC 3KEY UNLOCK WARNING SWITCH ASSEMBLY- IGN FUSEB143387E01ENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEI5EIFRONT DOOR COURTESY SWITCH (LH)FRONT DOOR COURTESY SWITCH (LH)HATCHBACK:SEDAN:B143388E01EI6ENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEISYSTEM DIAGRAMKeyTransponder ChipSecurity IndicatorFront Door Courtesy Switch AssemblyUnlock Warning Switch AssemblyTransponder Key AmplifierTransponder Key ECU AssemblyECMInjectorCoilInjectorB143389E01ENGINE IMMOBILISER ENGINE IMMOBILISER SYSTEMEI7EISYSTEM DESCRIPTION1. ENGINE IMMOBILISER SYSTEM DESCRIPTIONThe engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ECU that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ECU sends a signal to the ECM to prohibit fuel delivery and ignition, effectively disabling the engine.2. FUNCTIONS OF MAIN COMPONENTS3. SYSTEM FUNCTION When the transponder key ECU assembly detects that the unlock warning switch is ON, the ECU provides current to the transponder key coil and produces a faint electric wave. A transponder chip in the key grip receives the faint electric wave. Upon receiving the faint electric wave, the transponder chip outputs a key ID code signal. The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then the signal is transmitted to the ECU. The ECU compares the keys ID code with the vehicles ID code, which was previously registered in the ECU and then communicates the results to the ECM using the SFI communication. After the identification results show that the keys ID code matches the vehicles ID code and the ECU has confirmed that they match: 1) the immobiliser system is canceled and the engine starting controls (fuel injection control and ignition control) enter standby mode; and 2) the ECU transmits a security indicator signal that communicates indicator OFF to the transponder key ECU. Then, the transponder key ECU turns OFF the security indicator light.Component OutlineTransponder key coil/amplifierWhen key is inserted in ignition key cylinder, key coil receives key code. Then amplifier amplifies ID code and outputs it to transponder key ECU assembly.Unlock warning switch assemblyDetects if key is in ignition key cylinder and outputs results to transponder key ECU assembly.ECMThrough SFI commu